用法：
n. [语] 单词；话语；消息；诺言；命令
vt. 用言辞表达
Word has it that she's leaving.
据说她要走了。
The word is they've split up.
据说他们离异了。
He stalked off without a word.
他一言未发，怒冲冲地走了。
Just say the word, and I'll go.
只要发句话，我就走。
The news spread by word of mouth.
这消息是口头传开的。
We never doubted her word.
我们从不怀疑她的许诺。
